Disk-sharpener



CwB. HUTCHINS.

DISK SHARPENER. APPLICATION FILED MAY [3, 19 20.

1,374,01 2., Patented Apr; 5, 1921..

PATENT @h-FEQE;

CARL B. HUTCHINS, or ALoonA, IOWA.

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Specification of Letters Patent.

Patented Apr. 5, 1921.

application filed May 13, 1920. Serial No. 381,129.

To all whom izf may concern:

Be it known that I, CARL B. HU'roHINs, a citizen of the United States, residing at ilgona, in the county of Kossuth and State of Iowa, have invented certain new and useful Improvements in Disk-Sharpeners; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it aopertains to make and use the same.

This in ention relates to improved disk sharpeners for use in connection with plows, cultivators, and the like; and it has for its object to improve upon the construction of the disk sharpener shown and described in my U. S. Patent No. 1333112 granted to me on March 9, 1920.

Another object or" the invention is to provide a device of the above mentioned type which is more durable, has a greater range of adjustment, is more rigid and effective 1n use than my patented device or other similar device known by me; it being of such construction that the parts may be readily and easily disconnected to enable the device to be picked in a small package for shipment, and also permitting the device to be easily assembled by inex )QIlBIlCGCl persons.

Other objects and advantages of the invention will be apparent during the course of the following description.

In the accompanying drawings forming a part of this specification in which like nuinerals are employed to designate parts throughout the same;

Figure 1 is a perspective view of the device, illustrating the manner in which it is used.

Fig. 2 is an enlarged elevational view of a device constructed in accordance with my invention.

Fig. 3 is an end elevation thereof.

l is an enlarged detail section taken on the line 4-4 of Fig. 2, looking in the direction of the arrows. V

Fig. 5 is a horizontal sectional view taken on the line 55 of Fig. 3.

Tn the drawings, wherein for the purpose bracket D, all of which parts are of the wellknown construction;

For the purpose of supporting'frame D at an elevation to space the disks A from the ground, I employ a pair of jacks or supports 1 which may be constructed from a plurality of strips of'wood, arranged one on top of the other and secured together by means of a bolt 2. I do not desire to limit myself to any particulartype of support, and I therefore wish it to be understood that these supports may be'of any other suitable construction.

In order to rotate the disks I make use of a two-part pulley 3 which is adapted to be bolted on the shaft B in the mannershown. This pulley may be rotated by any suitable means, such as for instance by means of a belt (not shown).

My sharpening device comprises a pair of angle-bars 4, each of which has one of its flanges directed inwardly toward the correspending flange of the other bar in the manlongitudinally spaced apertures'7,the purpose of which will hereinafter beset forth. Examination of my device will disclose the fact that the lower portions of the inturning flanges 5 are removed and that the lower ends of the flanges 6 are directed inwardly toward each other and the extremities bent laterally and overlapped as shown at 8. The overlapped extremities are provided with alined openings through which a screw-' threaded member 9 is extended, it beingheld' in position by means of nuts 10. It is to be noted that theend of this fastening memher 9 extends beyond the overlappedends of e the bars The purpose of this construction is to provide a means for anchoring the lower ends of the bars. Ifdesired the portion of the member which extends below the overlapped ends 8 of the bars, may be tapered in the manner shown to provide a more effective anchoring means for the device. At their opposite ends, the angle bars are connected together by means of an operating handle 11. While this handle may be of any other construction, I desire to construct it in the manner shown. Examination of the showing thereof will disclose The sharpening element is in the form of a block of abrasive material, designated by the numeral i l. This block is removably secured between the angle-bars and when in position rests against the flanges 5 and 6.

being clamped in position by the last named flange. In carrying out this feature it will be seen that I make use of two bolts 15, which extend through the apertures 7, one being arranged above the abrasive element and the other being arranged below said element. To clamp the block in position it will be seen that the only thing necessary to do. is to tighten the nuts on the bolts 15. By means of the longitudinally spaced openings 7 it will be seen that the abrasive element may be raised or lowered to the desired height to effectively engage the disks.

From the foregoing description it will be seen that I have perfected an extremely novel and rigid disk sharpener which may be effectively used. ld ith it, it will be seen that the disks may be uniformly sharpened. It is to be noted that with such a device the disks will be rotated against the abrasive element instead of the latter against the disks. This method of sharpening will make it impossible to heat the disks or draw the temper. Therei only one part of the device which is subjected to wear, and this part, may be easily and readily replaced. A great deal of time and expense will be saved by such a device, and due to the construction which I employ the device will be found extremely inexpensive and well worth while. I I

Many disk sharpeners constructed in accordance with my invention have been actually used and have proven extremely satisfactory and have produced results beyond expectations. The device in fact is no more an experiment, and is a proven article.

In using the device, it will be first necessary to place the gang of disks on a level spot. The jacks 1 may then be brought into use to raise the disks above the surface in the manner shown in Fig. 1. It may be necessary to drive a couple of stakes at the opposite ends of the jacks to prevent them from moving. A small quantity of oil may be placed on the edges of'the disks to prevent undue friction. After the disks have ticular angle at which the sharpening ele-l ment is held, will be obtained from experience with the device. s

From the foregoing description taken in connection with the accompanying drawing,

it is believed that persons skilled in the art to which this invention relates, will be able to obtain a thorough understanding of the same, therefore, further description is deemed unnecessary.

I cla1m:

1. A sharpening device of the class described comprising a pair of spaced anglebars connected together at their lower ends,

each bar havin one of its flan es inturned the other flange being aperturcd, an abrasive element disposed between the apertured flanges and resting against the inturned flanges, bolt-s extending through said apertures, there being one bolt above and one below the abrasive element serving to clamp the flanges with which they co-act against said element. thus retaining it in place, and a handle at the upper ends of the bars.

.2. A sharpening device of the character set forth comprising a pair of'spaced angle bars, each having one of its flanges inturned, the lower portion of each inturned flange being'removed, the other flanges of the bars having their lower ends directed inwardly toward each other, the extremities being bent laterally, overlapped, and provided with alined apertures, a fastening member extending through said alined apertures,

having one of its ends extending beyond the overlapped ends to form an anchoring spur,

a piece of abrasive material secured between said bars and means including a handle connecting and spacing the upper ends of the bars.

3. A sharpening device comprising a pair of spaced bars having their lower ends directed toward each other and secured to.- gether to form a point, a plurality of sleeves, one being arranged between the upper portions of the bars and the others abutting the outer faces of the. bars and extending later-' ally therefrom to form hand grips, a bolt passing through said sleeves and bars to retain these parts together, and an abrasive element held between said bars.

In testimony whereof I have hereunto set my hand.

CARL B. HUTCHINS. 

